Stretching machine



c. HUNT. Er AL STRETCHING 'MACHINE Filed March 515 1922v July 30, l 929.

3 Sheets-Sheet Y QWN @EN NGN vN July 30, 1929- c. HUNT E1' AL ns'rRETcHING MACHINE Filed March 31, 1922 3 Sheets-Sheet 2 Fig-4 C. HUNTEl" AL STRETCHING MAcHlNE July.30, 1929.

Filed March s1, 1922 s sheets-sheet 5 Patented July 30, 1929.

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CHESTER HUNT AND FREDERIC BERTRAND, OF LYNN, MASSACHUSETTS, ASSG-NOES iTO UNTED SHOE MACHINERY COBPOEATON, OF PATERSON, NEW' JERSEY, A COR-PORATION 0F NEW JERSEY.

STRETGHING MACHINE.

Application filed March 31, 1922. Serial No. 548,450.

This invention relates to stretching machines and is herein shown asembodied iny a machine especially designed for stretching the shankportions of shoe soles.

Wvhen a shoe sole is died out from a hide the texture of the material isapproximately uniform from end to end. lin use, however, the forepart oftheV sole'is subjected to the most wear so that when it is completelyworn out the shank portion still maintains substantially its originalstrength and thickness. Since sole leather is comparatively expensive,this condition is not economical. States Letters Patent No. 1,552,608,granted September 8,1925, on our application, there is disclosed amethod of treating blanks such as shoe soles in which each blank is cutout to the dimension required by the forepart of the shoe of which it isto become a. part and shorter than the requirements of the shank, an dthen the shank is stretched by the application of tensile stress whilethe forepart is maintained unchanged. rThis stretching saves leather andalthough it may weaken the shank to some extent, nevertheless, in viewof the different exposure to wear of the forepart and the shank in use,such weakening is harmless.

One of the objects of this invention is to provide a stretching machinefor use in carrying out the above or similar methods.

Features of the invention consist in an organization. comprising meansfor restraining or controlling movement of portions or regions of thesole adjacent to the shank and means for applying tensile stress toanother portion of the sole to stretch it. Preferably, there is providedmeans for holding the forepart of a sole, means for engaging the shankportion of the sole, and means for effecting relative movement of saidtwo means to effect elongation of the shank portion of the sole.

ln the preferred construction illustrated, the forepart of each sole isclamped in a holder and carried in a predetermined path while a pressuremember, preferably in the form of a roller, engages the shank portion ofthe sole. to exert a drag or tensile stress upon it to draw it out tothe required dimension. This drag may be conveniently accomplished bymoving the holder at a greater speed than the pressure roller. In orderto facilitate the stretching action and to give In United permanence toit, as illustrated, spurs projecting from the pressure member crush ortear the libres in the locality where the stretching occurs. To aidfurther in maintaining the stretch in the material and as anotherfeature, the illustrated pressure roller is mounted to reciprocatetowards and from the carshown, the toe of each sole is located in arecess of the carrier by means of -a pin which can be adjusted in thedirection of the length of the sole. The sole is located centrally bymeans of pins that engage the side edges of the sole and preferablythese latter pins are v adjusted widthwise of the sole simultaneouslywith the longitudinal adjustment of the toe engaging pin. These andother features and advantages of the invention will appear from theconsideration of the following specitication and the accompanyingdrawings in which, i

Fig. l is a right hand side elevation with some parts in section ,andwith part of the driving gearing removed.

Figs. 2 and 3 are 'sectional details of the pressure roller and itsrockable mounting.

4t is a horizontal section of a portion of the left hand half of themachine.

Fig. 5 is a detail side elevation of the carrier and pressure roller,with the work in a position for the stretching action to begin.

Fig. 6 is a diagrammatic side elevation indicating the construction bywhich a greater speed is imparted to the carrier than to the pressureroller.

Fig. 7 is a front elevation of the right hand half of the machine withsome parts -removed.

This machine is duplex, that is, the right and left hand portions aresubstantially identical and arranged to receive the soles in pairs. Thedescription will therefore be largely confined toone half of themachine.

The carrier l2 for the soles is in the form CII Vof a drum or cylindersecured to and driven by the drum shaft 14 journaled in the framework.In opposite sides of the periphery of the carrier are recesses orflattened portions 16, 16 in which the foreparts of the soles aresecured and held in position by the clamping plates 18. Each clampingplate 18 has projecting teeth to engage and grip the sole and is mountedon a rod 20 supported in a yoke joining the arms 22 pivoted at the sidesof the drum at 24. To press the clamping plate against the cylinder,rods 26 loosely engage the rods 20 and, passing through the guide lugs28 on the drum, are constantly pressed in one direction by coil springs30 interposed between the guide lugs and adjusting nuts screwed on theends of the rods 26. To separate the clamping plates from the cylinderto leave room for the insertion of a sole as the carrier reaches theworking position, an arm 32, joined to one of the arms 22 above referredto, has a roller at its end running on the periphery of a fixed cam 84which has a raised portion 86 formed to actuate the arm at apredetermined point in the cycle of operations and release the clampingplate 18 against the tension of the springs 30. Thus, in Fig. 1, theclamping plate 18 at the left is shown in a position to receive theforepart of a sole and is about to close, whereas the clamping plate atthe right is shown just after reaching its released position. Thecylinder is substantially symmetrically formed with sole receivingrecesses at opposite sides so that when one sole is being received inoperative position, the sole on the opposite side is being released,etc.

The mechanism for locating the soles longitudinally comprises a pin V 40springpressed through an opening in the carrier at the flattened portion16, this pin being carried at the lower end of a sliding member 42 inthe form of a rack. Longitudinal movement of the slide adjusts the pin40 in the direction of the length of the sole and this provides foradjustment to accommodate the different sizes. The rack on the slide 42is engaged by a pinion 44 which has atrunnion 46 journaled in a portionof the carrier. The

pinion meshes with the teeth on a large ring` 48 rotatably adjustable onthe carrier and held between a web on the carrier and the ring-shapedcover 50 fastened by screws to the carrier. The ring is turned by meansof a pinion 52 on the rock-shaft 54 j ournaled in the carrier andactuated by a handle 56 the position of which is indicated by a suitabledial on thecarrier, this dial, if desired, having size indicationsthereon.

The mechanism for centralizing the soles comprises a pair of spacedlocating pins 60 project-ing from a sleeve or housing 62 which ispivoted on the carrier on radially extending pivot pins 64. Integrallyformed with the sleeves 62 are arms 66 (see dotted lines in Fig. 4)formed at their meeting ends with interengaging gear teeth whereby thelocating pins are simultaneously moved and kept in a symmetrical.position with respect to the center of the carrier. The pins areadjusted towards or from each other by means of a pin 7 0 formed on oneof the sleeves 62 and engaging a wedge-shaped cam 72 secured to one sideof the ring 48 above referred to. The pin is held against the cam faceby means of a spring 76 interposed between the carrier 12 and anextension 74 on one of the sleeves 62 (see Fig. 4). It is apparent thatby this construction, the rotative adjustment of the ring 48 carryingthe cams 72 will simultaneously spread the side locating pins 6() andthrough the described gearing cause the simultaneous adjustment of thetoe locating pin 40.

When a sole is applied to the carrier it is inserted toe end firstbetween the side locating pins 60 which are thereby separated againstthe tension of their spring. The spring causes the pins to press againstthe side edges of the sole to centralize the latter and since thispressure would tend to prevent the release of the sole when it reachesthe releasing position at the right hand side of the machine, provisionis made for withdrawing one of the pins into the interior of thecarrier. As shown, the pins are normally spring-pressed outwardly in thesleeves 62, this movement being limited by contact of the pins with theclamping plate 18. One of the sleeves is cut away as shown at 8O and thecorresponding pin is slotted to receive a flattened projection 82carried by an arm 84 of a lever pivoted at 86 on the carrier. Anotherarm 88 of the lever has a roller at its end traveling on the peripheryof a cam 90 fixed to the frame of the machine. The cam 90 has a raisedportion 92 by means of which the arm 88 is actuated to cause the pin 60to be depressed within its sleeve, thereby releasing the sole to allowit to drop out of the machine.

When a sole is clamped to the carrier the shank and rear end portionslie against the cylindrical surface of the carrier, thus leaving theshank in a convenient position for treatment. Mounted adjacent to thecarrier is a pressure member in the form of a roller 100 which is cutaway for a large portion of its periphery. At a predetermined point .inthe cycle of movement, the pressure roller 100 moves into engagementwith the shank portion of the sole and exerts a drag thereon (see Fig.'5). At this time, a series of spurs 101 projecting from the pressureroller tear or crush the fibres of the material, .partly as a result ofthe movement of the spurs longitudinally of the sole, in order tofacilitate the stretching action and give permanence to it. Since somesole blanks are thicker on one side than on the other and might begripped more firmly on the thicker side, the pressure roller is rockablymounted on a block 102 secured to the shaft 104 see Figs. 2 and 3) rlhismounting comprises complemental rounded surfaces 106 formed on theroller and on the block 102, the roller being secured loosely in placeby screws 108 which extend through slots 110 into the block 102. Springs112 inserted in recesses in these members serve to keep the rollernormally in a central position. As a further means for setting the blankto prevent its subsequent contraction, mechanism is provided to pound orhammer it. lic-- cordingly, the pressure roller is carried on a rockablelever consisting` of a pair of arms 1141 pivoted on a rod 116 and a longarm 118 extending horizontally from one of the arms 114. To the arm 118is pivoted a block 120 in which is threaded'a rod 122 the upper end ofwhich is smooth and slides through an opening in a guide lug 1211iixedto the framework. Interposed between an abutment plate 126adjustably mounted on the. rod and the under side of the guide lug 124.is a strong coil spring 128 which normally tends to press the roller 100toward the carrier 12. Movement in this direction to cause the hammeringmovement is accomplished by the springunder the control ofia cam.Movement is limited by means of stop lug 130 on the arm 114; engaging anadjusting screw'182 in the framework. At the free end of the arm 118 isa pivot 18sL to which is secured a block 186, this block beingadjustably connected to a yoke 140 by a right and left screw threadedrod 138. rlhe yoke 140 embraces a drive shaft 142 journaled in the frameof the machine,

iid shaft carrying a lobed cam 146 on which runs a roller 14A secured tothe upper end of the yoke 140. It is apparent that, by thisconstruction, rotation of the cam' 14:6 will cause the reciprocation ofthe yoke and thereby a rocking of the pressure roller towards and fromthe carrier, the movement towards the carrier being an impositive oneunder the influence of the spring 128 and the movement in the oppositedirection being positive. rlhe shaft has at one end a pulley 148 drivenby a belt 150 and a gear 152 liXed to the shaftmeshes with a large gear1541 on the carrier shaft 1li. There is a gear 154 near each end of theshaft 141 and each gear meshesy with a smaller gear 156 (see Fig. 7)secured to a stub staft 158 mounted in a bracket 160 on the frame, saidshaft being loosely connected through a universal joint 162 with theshaft 104 carrying the pressure roller. This loose connection isprovided in order to allow for the rocking movements of the shaft- 104with its roller. lt should be noted from Fig. 6 that the gear 154 is` ofsmaller diameter than its corresponding carrier 12, whereas the gear 156is larger than its driven roller 100. riherefore the peripheral speed ofthe cylindrical carrier will be greater than that of the roller and as aresult a drag or tensile stress will be exerted upon the shank yof thesole as the forepart is moved relatively to the pressure roller.

Assuming that the toe and side locating pins have been adjusted bysetting the lever 56 opposite the desired size designations on thescale, the operator first inserts a sole, properly tempered, toe endfirst between the side pins and against the toe pin and then starts themachine. Rotation of the cylinder 12 relatively to the fixed cam 34causes the clamp plates 18 to grip the forepart of the soles against thecylinder and, as the work reaches the position shown in Fig. 5, thepressure member 100 comes into engagement with the shank portion. Thedifference in peripheral speed between the two rotating members exerts adrag upon the stock and the spurs 101 tear or crush the fibres tofacilitate the stretching action.l The pressure roller 100simultaneously hammers the stock to render the stretch permanent and asthe work reaches a position at the right of the machine the cam 36 opensthe clamp plate 18 and thecam 90 draws in the pin 60 and the work isreleased and allowed to drop out of the machine.

Although the invention has been set forth as embodied in a particularmachine, it should be understood that the invention is not limited inthescope of its application to the particular machine shown and described.Y

Having fully described our invention, what we claim as new and desire tosecure by Let` ters Patent of the United States is 1. ln a machine forstretching blanks, a support, means for clamping one portion of a blankon the support, a rotary pressure member for pressing another portion ofthe blank against the support, and means for causing such movement ofthe pressing surface of the pressure member and the adjacent surface ofthe support in the same direction at different rates as to stretch theblank to the required dimension.

2. ln a machine for stretching sole blanks, a support, means forclamping the forepart of a blank on the support and moving it in apredetermined path, a pressure member for pressing the shank portion ofthe blank against the support, and mea-ns for imparting to the pressuresurface of the pressure member a less movement than that imparted to thesupport to ,stretch the shank portion of the blank.

3. ln a machine for stretching sole blanks, means for supporting anunattached sole blank and moving it in a predetermined path, a membermounted for reciprocating movement towards and from the supportingmeans. and power operated means to reciprocate said member to hammer theblank.

4. ln a machine for stretching blanks, means for clamping one portion ofa blank, a pressure member for gripping another portion ofthe blank,spurs secured to the pressure member to tear and crush the ibres, andmeans for causing relative movement of the spurred pressure member andthe blank to stretch the blank to the required dimension.

5. In a machine for stretching blanks, means for clamping one portion ofa blank and moving it in a predetermined path, a rotary member arrangedforcibly to engage another portion of the blank to roll said otherportion, and spurs proj ecting from the rotary member to tear and crushthe fibres.

6. In a machine for stretching blanks, means for supporting a blank andmoving it in a predetermined path, a member mounted for reciprocatingmovement against said supporting` means to hammer said blank, and Ispursprojecting from said reciprocating member to tear or crush the libres.

7. In a machine for stretching sole blanks, a rotary carrier havingmeans tovclamp one portion. of a blank in flat condition on the carrier,a pressure rollerfor engaging another portion of the blank, and meansfor moving the roller at a diHerent speed from the carrier to exerttension on the blank to stretch it.

8. In a machine for stretching blanks, means for clamping one portionot' a blank, a member mounted for reciprocating movement against anotherportion of the blank to hammer it, and means for moving the hammeringmember with the blank but at a different speed to exert tension on theblank to stretch it.

9. In a machine for stretching4 blanks, means for supporting a blank andmoving it in a predetermined path, a pressure roller for engaging theblank for rolling said blank to stretch it, and means for reciprocatingthe roller towards and from said supporting means to hammer the blank.

10. In a machine for ,stretching blanks, a rotary carrier having meansto clamp one portion of a blank, a roller for engaging lanother portionof the blank for rolling said otherportion, means for rotating saidroller at a different s )eed from the carrier to exert tension on thelank to stretch it, and means for reciprocating the roller towards andfrom the carrier to hammer the blank to set it.

11. In a machine for stretching blanks, a rotary carrier having means toclamp one portion of a blank, a pressure roller engaging another portionof the blank for rolling said other portion, means tor rotating saidroller at a different speed from the carrier to exert tension upon theblank to stretch it, and spurs projecting from the roller to tear andcrush the fibres.

12. In a machine for stretching' blanks, means for clamping one portionof a blank, a support and a pressure roller for engaging another portionof the blank for rolling said other portion to stretch it, means forreciprocating the roller bodily towards and from "the support to hammerthe blank and set it,

rotary carrier having means to clamp the.

forepart of a blank and move it in a predetermined path, a rollerfor-engaging another portion of the blank for rolling` said otherportion, means for rotating said roller at a slower speed than thecarrier to exert a drag upon the blank to stretch it, means forreciprocating the roller towards and from the carrier to hammer theblankto set it, and spurs projecting from the roller to tear and crushthe libres.

15. In a machine for stretching blanks, a rotary support for a blank, arotary pressure member having an axis extending transversely of theblank for rolling said blank against the support, and a rocking supportfor the pressure member to equalize the pressure at the two sides of ablank of uneven thickness.

16. In a machine for stretching sole blanks, a. rotary carrier, a clampfor securing the forepart of a blank to the carrier, a rotary pressuremember for rolling another portion of the blank against the carrier,driving mec-hanism for rotating the carrier and pressure member atdifferent speeds, and a rocking support for the pressure member topermit the pressure member to press equally on the two sides of a blankof uneven thickness.

17. In a machine for stretching blanks, a rotary carrying member havingmeans to clamp one portion of a blank, a cooperating rotary pressuremember for engaging another portion of the blank for rolling said otherportion, and intermeshing gears having driving connection with therotary members, one or' the gears having a larger periphery than itscorresponding rotary member whereby the peripheral speed or' said rotarymember is decreased to exert a drag on the blank. l

18. In a machine for stretching blanks, a rotaryV carrying memberhaving` means to clamp one portion of a blank, a drive shaft for thecarrying member having a gear ot smaller periphery than the carryingmember, a rotary pressure roller tor engaging another portion of theblank for rolling it against the carrying member, and a gear havingdriving connection with the pressure roller, said gear meshing with thefirst gear and having a larger periphery than the pressure roller,thereby reducing the speed of the pressure roller to exert tensilestress upon the blank.

19. In a machine for stretching blanks, a supporting member, a lever, apressure roller mounted on the lever, means for driving the pressureroller to cause it to roll a blank, and means for rocking the lever tocause the roller to hammer the blank.

20. In a machine for stretching blanks, a supporting member, a lever, apressure roller mounted on the lever, means for driving the roller tocause it to roll the work, a spring tending to rock the lever and theroller in a direction to pound the work, and a cam for moving' the leverand the roller in the other direction. p

21. In a machine for operating on sole blanks, a rotary cylinder havinga recess in its periphery to receive the forepart of a sole, a clampingplate, yielding means for pressing the clamping plate towards thecylinder to clamp the forepart of the sole, means for rolling andhammering the shank portion ot the sole, and a cam for releasing theclamping plate.

22. In a machine for operating on sole blanks, a rotary carrier havingmeans to clamp the forepart of a sole, a pressure roller having thegreater portion of its periphery cut away, and means for rotating thepressure roller in timed relation to the carrier to cause the roller toengage the shank of the sole.

23. In a machine for stretching sole blanks, a rotary cylinder having arecess in its periphery, a clamping plate supported in the recess toclamp the forward portion of a sole against the cylinder', a pressureroller having a cut-away portion, and means for rotating the roller intimed relation to the rotation of the cylinder to grip the shank of thesole and stretch it to the required dimension.

2&1-, In a machine for stretching sole blanks, a rotary carrier havingmeans to clamp the forepart of a sole, a pin for engaging the toe olithe sole to locate the shank at the desired position, and means foroperating on the shank ofthe sole to stretch it.

In a machine for stretching sole blanks, a support having means to clampthe forepart of a sole and move it -in a predetermined path, a pin forengaging the toeof the sole to locate the shank at the Vdesiredposition, and means for operating on the shank of the sole to stretchit.

26. In a machine for stretching sole blanks, a rotary carrier havingmeans to clamp the orepart of a sole, a pin on the carrier for engagingthe toe of a sole, and a sliding support for the pin to adjust thelatter lengthwise of a sole.

27. In a machine for stretching sole blanks, a rotary cylinder having arecess in its periphery to receive the orepart of a sole, a pin forengaging the toe of the sole to locate the shank on the periphery of thecylinder, a clamping plate, means lor actuating the plate to clamp theorepa'rt against the cyl inder, and means for operating on the eX- posedshank of the sole to stretch it to the required dimension.

28. In a machine for stretching sole blanks, a rotary cylinder having arecess in its periphery to receive the it'orepart of a sole, a pin forengaging the toe of the sole to locate the shank at the desiredposition, means for adjusting the pin for different sizes of soles, aclamping plate for holding the 'rorepart of the sole on the cylinder,and means for engaging the shank of the solev 'to stretch it.

29. In a machine for stretching sole blanks, a carrier, a pin on thecarrier for engaging the toe of a sole to locate the shank, pins forlocating the sides of the sole, mechanism for simultaneously adjustingthe pins for dife ferent sizes of soles, means for clamping the soleagainst the carrier in adjusted posit-ion,

and means for engaging the shank of the sole to stretch it.

30. In a machine Jfor stretching sole blanks, a carrier having means toclamp the orepart et a sole, locating pins for engaging the side edgesof a sole to locate the sole widthwise on the carrier, and means foroperating on the shank of the sole to stretch it. i

3l. In a machine for stretching solerblanks, a rotary cylinder having arecess in its periphery to receive the orepart of a sole, pins forengaging the side edges of the sole to locate the sole widthwise, meansfor adjusting the pins for different sizes of soles, means for clampingthe :torepart of the sole against the cylinder, and means for engagingthe shank of the sole to stretch it.

32. In a machine for operating on sole blanks, a rotary carrier, a pairot' locating pins on the carrier, means for pressing the pins towardseach other to engage the sides or' a sole, and means or'moving one ofthe pins radially of the carrier to release the blank. 33. In va machinefor operating on sole blanks, a rotary carrier, pins for Vengaging thevedges of a sole to locate the sole widthwise, said pins being gearedtogether for simultaneous movement, a Ycam eiif ,ag ingy one of thepins, and a ring supporting the cam and being rotatably movable toadjust the degree of separation oit' the pins.

34. In a machine for operating on blanks, a movable carrier for a blank,a pair of locating pins' projecting from the carrier, means for pressingthe pins towards each other to grip between them the sides of a blank,and means for moving one of the pins to release the blank.

35. In a machine for operating on blanks, a carrier, a pair of locatingpins projecting from the carrier, means for pressing the pins towardseach other to grip between them the' sides of a blank, and meansactuated in the movement of the carrier for depressing one of the pinswithin the carrier t0 release the blank.

36. In a machine for operating on blanks, a carrier, a pair of sleevespivoted to the carrier, spring pressed pins mounted in the sleeves andprojecting from the carrier to locate the sides of a blank, means forpressing the sleeves towards each other lto cause the pins to grip theblank, and means for depressing one of the pins within its sleeve torelease the blank.

37. In a machine for stretching sole blanks, the combination of meanscomprising parallel surfaces for controlling movement of the forepart ofa sole blank between them, and means for applying tensile stress-to theentire transverse section of the shank portion of the blank to elongatethe blank a substantial amount.

38. In a machine for stretching sole blanks, the combination of clampingmeans for holding a major portion of a sole blank from stretching, andmeans to apply tensile stress to an entire cross-sectional area of theblank for drawing out the unclamped portion of the blank in its ownplane to the required dimension.

39. In a machine for stretching sole blanks, the combination of meansfor applying uniform pressure to the forepart of a blank to clamp andhold it against movement, and means for applying tensile stress to across section of the shank portion of the blank 'materially to increaseits size.

40. In a machine for stretching sole blanks, the combination of meansfor holding the forepart of a blank to prevent its being stretched, andmeans for stretching the entire transverse section of another portion ofthe blank to effect material elongation of the blank. l

41. In a machine for stretching sole blanks, the combination of meansfor gripping a portion of the blank which is not to be stretched, andmeans for applying tensile stress progressively to different entiretransverse sectional areas of the remainder of the blank to stretch itby increments. l

42. In a machine for stretching sole blanks, the combination of meansfor restraining movement of a portion of a sole blank, and means forapplying tensile stress to the entire transverse section of anotherportion of the blank to stretch it materially.

43. In a machine for stretching sole blanks, the combination of meansfor controlling lmovement of a portion of a sole blank, and

means for applying tensile stress to the entire cross-sectional area ofanother portion of the blank permanently to increase its length.

44. In a machine for stretching sole blanks, the combination of meansfor controlling movement of the forepart of the blank, means forengaging another portion of the blank, and means for effecting relativemovement of said two means lengthwise of the blank to effect materialelongation of the shank portion of th-e blank.

45. In a machine for stretching sole blanks, the combination of meansfor restraining the forepart of the blank from endwise movement, meansfor engaging the shank portion of the blank, and means for effectingrelative movement of said two means lengthwise of the blank to effectmaterial and permanent elongation of the shank portion of the blank.

46. In a machine for stretching sole blanks, the combination ofrelatively movable'members having parallel surfaces to receive theforepart of a blank, means for relatively operating the members to clampthe forepart and prevent change of its shape, and means engaging theshank portion of the blank and movable relatively to the forepartclamping means lengthwise of the blank for effecting elongation of theshank portion of the blank.

47. In a machine for stretching sole blanks, the combination of membershaving parallel surfaces of areas sufiicient to engage substantially theentire forepart of a sole blank, means for relatively operating saidmembers to clamp the forepart of a sole blank between them, and meansengaging the shank and movable relatively to the clamping mea-nslengthwise of the blank to apply tensile stress to the entire crosssectional area of the shank portion of the blank to stretch it to asubstantial extent.

In testibony whereof I, the said Crrnsfrnu HUNT, have signed my name tothis specification.

CHESTER HUNT. In testimony whereof I, the said FREDERIC E. BERTRAND,have signed my name to this specification.

FREDERIC E. BERTRAND.

